Herman v



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H. V. BERNHARDT. APPARATUS FOR FORMING RINGS.

-No.473',139. PatentdApr. 19,1892.

2210 in? E i ATTORNEY?" W|TN S 8: I Q9 INVENTORS I, H.V. Bernhardt. I

NITE STATES ATENT FFICE.

HERMAN V. BERNI-IARDT, OF BROOKLYN, NEW YORK, ASSIGNOR TO JOSEPH B.BOWDEN, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 473,139, dated April19, 1892.

Application filed June 16, 1891.

T at whom it may concern:

Be it known that I, HERMAN V. BERNHARDT, of Brooklyn, in the county ofKings and State of New York, have invented a new and Improved Apparatusf0 rFormingRin gs, of which the following is a specification.

My invention relates to the manufacture of seamless rings, the mainobject of the invention being to produce an apparatus whereby by asingle operation tubular blanks may be pressed to the desired form incross-section; and to the end named it consists of certain novelconstructions, arrangements, and combinations of elements to behereinafter de- I 5 scribed, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar reference-figures indicate :0corresponding parts in all the views.

Figure 1 is a central sectional view of the apparatus which I prefer toemploy in carrying out my improved method of forming rings, the partsbeing represented as they appear after the tubular blank has beenadjusted to place, sections have been forced together. Fig. 2 is asimilar view,the parts, however, being shown as they appear after theformation of the ring.

0 Fig. 3 is a side view of a lower mandrel-section of modified form, aportion of the lower die being shown in section. Fig. 4: is a similarView of another modification. Fig. 5 is a view of the seamless tube fromwhich I prefer to cut my annular blanks. Figs. 6, 7, 8,

and 9 are views of the product of my apparatus.

In the drawings above referred to 20 and 20 represent themandrel-sections, and the approachingends of these sections are eachshaped to form one-half of the inner face of the ring, as is clearlyshown at 5 5. The dies 11 14 are apertured to receive themandrelsections, and by preference the several parts are shaped as shownin the drawings.

In formingaring a tubular blank 4is placed as represented in Fig. 1, andthen by means of a proper press the die 14. and the mandrelsection 20are forced downward upon said blank, the pressure being applied to theedges but before the dies and the mandrel- Serial No. 396,438. (Nomodel.)

desired manner; butI prefer to cut them from a seamless tube, as 30.(See Fig. 5.)

If desired, the die-faces and the mandrelsections may be slightly cutaway at points adjacent to the recesses 2, 2, 5, and 5, and then ringswith double fins, such as shown in Figs. 8 and 9, may be produced.

In case the rings made as hereinbefore described are to be used asfinger-rings they would ordinarily be subjected to the action of arolling and sizing machinesuch, for instance, as the one described inLetters Patent of the United States No. 426,707.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is- 7 5 1. The combination, with apair of dies, of an independent or separate sectional arbor or mandrel,each of the dies being made with a section adapted to shape one-half ofthe outer surface of a ring and each of the mandrelsections being madewith a section adapted to shape one-half of the inner surface of a ring,substantially as described.

2. The combination, with a pair of dies formed with recesses2 2, ofmandrel-sections 8 5 formed with recesses 5 5", the dies and mandrel-sections being separate, substantially as described.

3. The combination, with a pair of dies that are centrally apertured, ofmandrel or arbor sections which fit within the die-apertures, the partsbeing shaped so that the mandrelsections bear upon the dies, wherebypressure applied to the mandrel-sections serves to press the diestogether.

HERMAN V. BERNHARDT.

Witnesses:

EDWARD KENT, J r., ARTHUR L. KENT.

